There are way too many Isekai anime series. Mushoku Tensei: Jobless Reincarnation is the one of the only ones I will watch religiously. If you aren’t familiar with the term, The Japan Times has a great article about the genre. Essentially, the main character dies and wakes up in an alternate universe. The new universe is generally themed around what ever the original character loved.
The Plot
The story, at a high level, is the pretty simple but really well written. I, personally, fell in love the characters. The characters are pretty complicated people. When you add the reincarnation aspect, the story ends up significantly more interesting than other isekai.
An unnamed obese 34-year-old Japanese NEET is evicted from his home by his four siblings following his parents’ deaths and skipping the funeral service. Upon some self-introspection, he concluded his life was ultimately pointless but still intercepts a speeding truck heading towards a group of teenagers in an attempt to do something meaningful for once in his life and manages to pull one of them out of harm’s way before dying. Awakening in a baby’s body, he realizes he’s been reincarnated in a world of sword and sorcery and resolves to become successful in his new life, discarding his past identity for his new life as Rudeus Greyrat. Due to inherited affinity and early training, Rudeus becomes highly skilled at magic. During his childhood, he becomes a student of demon magician Roxy Migurdia, a friend to demihuman Sylphiette, and a magic teacher to noble heiress Eris Boreas Greyrat.
https://en.wikipedia.org/wiki/Mushoku_Tensei
The anime series is now playing on Crunchy Roll. So far there are only two seasons of the show but it looks like there is another season coming however, there aren’t any dates available.
The Origin of Mushoku Tensei
The original story began as a light novel published online on the site Shōsetsuka ni Narō in 2012. It transformed into a manga series a couple of years later in 2014. The series is insanely popular and has sold millions of copies globally.
I’ve not read the manga or the light novels, I usually stick just to the anime unless I really like it, like 86.